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Tool Talk Discussion Forum

makita

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tool nut

02-23-2006 09:21:34




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I have a makita 5" hand grinder. Used very little. Very suddenly motor started to sound like it needed brushes. (also started to smoke) Brushes didn't look bad at all, but I replaced anyway. No improvement. What is wrong and is this tool toasted?




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retired farmer

02-24-2006 18:46:23




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 Re: makita in reply to tool nut, 02-23-2006 09:21:34  
I have a four inch Makita grinder that I bought back in the early 90's when I had my ranch. I used to build a lot of stuff and used the heck out of it. I just replaced the brushes about a month ago and noticed the commutator was getting worn. I didn't have a lathe to clean it up so I sanded the black off it and replaced the brushes. Ran fine until today when it started to get hot and smell funny. Think it is time to buy a new one. Wouldn't buy anything but Makita. It is 13,000 rpm and works far better than any other brand I have tried. Those chinese grinders aren't worth bringing home. Haven't had one that lasted more than about a month before burning up. Same with Sears.

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Stan in Oly, WA

02-25-2006 21:25:04




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 Re: makita in reply to retired farmer, 02-24-2006 18:46:23  
I'm not a fan of Chinese made goods (although I like their food a lot) and I think the ax might fall real soon and we'll all be sorry that we borrowed so much of their money to buy so much of their goods. That said, I haven't had quite the experience you describe with Chinese made grinders. I bought four Cummins (Chinese made) 4 1/2" angle grinders a couple of years ago when the Cummins dog and pony show was in town; 2@$10 ea and 2@$20 ea. The "better" ones advertised needle bearings, and blah, blah, blah. One of them failed almost before I could get it out of the box---burned the brushes, then burned the replacement brushes. I only started using the other one a few weeks ago, but it seems okay so far. The $10 one is fine, but weak. I took advantage of Harbor Freight's retail store return policy twice to get a decent Chicago Electric 9" angle grinder. At the second return, the store manager told me that I might want to buy a Milwaukee grinder if I was going to use it that hard. I consider it a limited use tool; I'm sure I'd burn it out if I used it the way I use the 9" Milwaukees at the shop (hard and long.)

Sounds like I'm having exactly the experience you described, doesn't it? Well, I wanted to get the bad news out of the way first. The good Chinese angle grinders you can get at Harbor Freight are the 4" and 4 1/2" Chicago Electric ones. I haven't been able to wear one out yet despite countless hours of hard, dirty use, countless drops onto concrete floors and driveways and, in general, a totally undeserved lack of proper respect. I would have treated it a lot better if I'd known I was going to have it so long; I thought it was just a $14 throw away tool. I've got several others that I use regularly so that I can keep grinding discs, wire wheels, polishers, etc. set up and ready to use. Same story; no sign of wanting to quit.

I love good tools, but I'll take them where I get them. Brand names don't impress me that much; practically every good brand I've ever purchased has let me down at least once if I buy enough of their products.

Stan

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retired farmer

02-25-2006 23:21:03




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 Re: makita in reply to Stan in Oly, WA, 02-25-2006 21:25:04  
I think I might have one of those four inch Chicago Electric grinders, anyway it looks like one. Had two of them at one time. First one ate the brushes in less than an hour of combined usage, replaced them, and within the next hours use, the armature was shot. This one is still running, had to replace the electric plug last month because the insulation covering rotted and the wires were about ready to break. It is rated at ten thousand rpm and is to slow for me. Makita makes it look sick. The people at Harbor Freight are nice enough and they do have some good prices on some stuff as long as there are no moving parts on it. So far everything I have bought from china has been a piece of junk. Spent a lot of money on a twenty ton jack several years ago, worked for awhile and then started locking up when you try to release the pressure. Bought a nine by twenty metal lathe from them about four years ago and haven't taken it out of the wood crate yet. Almost afraid to because something will probably be wrong with it. Have nothing good to say about china. Hope I am long gone by the time they take over the world.

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Chris Kwietniowski

02-24-2006 15:32:23




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 Re: makita in reply to tool nut, 02-23-2006 09:21:34  
Though its not my tool of choice, I have a 7" Makita grinder and can't kill the thing. I use it heavy, but everyday, and the cord and some plastic parts are cracking up and geting destroyed, but the motor works as good as any. Possibly the older tool was made better...



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Bob

02-23-2006 22:04:34




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 Re: makita in reply to tool nut, 02-23-2006 09:21:34  
Didn't you know electrical things operate on smoke, and once they break and let the smoke out, they no longer work. Since you've let all the smoke out, you might as well toss the grinder, and get a new one.

Of course, you could probably order a new armature, and repair the tool, for only a few more $$$ than it would cost to replace the grinder with a new one.



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jon holt

02-23-2006 20:12:31




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 Re: makita in reply to tool nut, 02-23-2006 09:21:34  
I have a Makita 4" grinder and my dad has one. We have had ours for at least 20 years and, knock on wood, we have had no problems with them. I don"t use mine every day, but I do use it alot. I have bought several brands and there are a lot of good ones.



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jdemaris

02-23-2006 19:43:26




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 Re: makita in reply to tool nut, 02-23-2006 09:21:34  
I was in charge of tool purchasing for the shop at a Deere dealership. We went through many 5" and 9" grinders. Makitas did not hold up well at all, they had many armature failures. We tried Milwaukee they were somewhat better. Then we tried some Metalbos that we got from our welding supply company, and they held up quite well. Just as an experiment, we bought a dozen cheap grinders from Harbor Freight "Chicago Electric" - 4 1/2" and 9". They were a third of the price and held up just as well as the Metalbos. I still have several that I use now in my shop that were originally purchased at the Deere dealership in the late 70s - early 80s.

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Roy Suomi

02-23-2006 17:13:09




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 Re: makita in reply to tool nut, 02-23-2006 09:21:34  
I went through several Makita's some time back.. I started buying Metabo and Porter Cable small grinders. I have had great luck with these.. For some reason the smaller grinders from Makita go south prematurely.. I have a 9" Makita grinder that won't quit.. They have an unusual plastic sort of smell when they decide to retire early.



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